Cingula compsa (E.A. Smith, 1890)
Onoba compsa P. Bartsch, 1987
Alvania concinna A. Adams, 1861
Onoba concinnata J.G. Jeffreys, 1883
Cingula conica C.B. Adams, 1850
Pusillina consimilis T.A. de M. Monterosato,1890
Alvania consociella T.A. de M. Monterosato,1884
Cingula conspecta (E.A. Smith, 1904)
Alvania conspicua P.M. Pallary, 1900
Attenuata contigua (A.W.B. Powell, 1940)
Rissoa cornea (S.L. Lovén, 1846)
Alvania corneti H.J. Hoenselaar & J. Goud,1998
Alvania corona F. Nordsieck, 1972
Benthonellania coronata R.S. Absalão & F.N. Santos,2004
Merelina coronata (A.W.B. Powell, 1926)
Simulamerelina corruga (C.F. Laseron, 1956)
Alvania coseli S. Gofas, 1999
Alvania cosmia (P. Bartsch, 1911)
Rissoa costeiensis (FOSSIL) T. Kowalke& M. Harzhauser, 2004 †
Manzonia crassa (F. Kanmacher, 1798)
Manzonia crassa exigua (F. Kanmacher, 1798)
Onoba crassicordata H.W. Worsfold, G.J. Avern& W.F. Ponder, 1993
Pusillina crassicosta (A.W.B. Powell, 1955)
Peringiella crassilabris (FOSSIL) R. Marquet, 1997 †
Powellisetia crassilabrum (A.W.B. Powell, 1940)
Merelina crassissima A.W.B. Powell, 1937
Simulamerelina crassula (H.A. Rehder, 1980)
Alvania craticula (FOSSIL) (Briart & Cornet, 1887 †)
Rissoa crawfordi E.A. Smith, 1901
Manzonia crispa (R.B. Watson, 1873)
Merelina crispulata A.W.B. Powell, 1937
Crisilla cristallinula (A. Manzoni, 1868)
Merelina crossaeformis (A.W.B. Powell, 1926)
Frigidoalvania cruenta (N.H. Odhner, 1915)
Alvania cruzi (Z.J.A. De Castellanos& C. Fernández, 1974)